What can cause Secondary encephalitis?

Viral infections

* Herpes simplex virus (HSV-1 and HSV-2)

* Varicella-zoster virus (VZV)

* Epstein-Barr virus (EBV)

* Cytomegalovirus (CMV)

* Measles virus

* Mumps virus

* Rubella virus

* Human immunodeficiency virus (HIV)

Bacterial infections

* Streptococcus pneumoniae

* Staphylococcus aureus

* Haemophilus influenzae

* Neisseria meningitidis

* Mycobacterium tuberculosis

* Leptospira interrogans

* Borrelia burgdorferi (Lyme disease)

Fungal infections

* Cryptococcus neoformans

* Candida albicans

* Aspergillus fumigatus

Parasitic infections

* Toxoplasma gondii (toxoplasmosis)

* Plasmodium falciparum (malaria)

* Trypanosoma brucei (African sleeping sickness)

Other causes

* Autoimmune disorders, such as multiple sclerosis and lupus

* Sarcoidosis

* Cancer

* Radiation therapy

* Head injury